A gathering of more than 5 people that involves hallucinogenic products and inebriating liquids. Commonly used as a better way of saying "I got wasted." There are instances however when this term can be used quite harmlessly as a way of saying "we hung out" especially if said when the person in question is finished college already.

My friend Sam told me that he went to a social gathering as he looked at me with a hazed expression.